Susan Balla, Executive Director of THE CHAMBER of Commerce, will retire next month. The retirement, long in the works, is effective Feb. 15, according to a statement released by the business group’s board of directors Friday morning. Balla has served as the Executive Director since October 2009 when the Cranberry Chamber of Commerce and the Northern Allegheny County Chamber of Commerce merged. THE CHAMBER’s footprint covers three counties and 16 municipalities. Under her direction, THE CHAMBER has grown in membership, sponsorships, programs and services. Balla will take some time to travel and spend time with her husband in their Florida residence while keeping their home in Pennsylvania.